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Stair-ascent performance in elderly women: effect of explosive strength training
Holsgaard-Larsen A, Caserotti P, Puggaard L, Aagaard P
Journal of Aging and Physical Activity 2011 Apr;19(2):117-136
clinical trial
4/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: No; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: No; Adequate follow-up: No; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

Explosive-type strength training may alter kinetics and neuromuscular activity during stair ascent in elderly women. This may improve functional ability. Nineteen women (69.7 +/- 3.4 yr) were randomly allocated to strength training (TG; twice per wk, 12 wk) or a control group (CG). Stair ascent was assessed at self-chosen (AFV), standardized (ASV), and maximal velocity (AMV) pre- and posttraining. Ground-reaction force (GRF) and EMG quantified kinetics and neuromuscular activity. After training, TG increased AMV and AFV velocity by 8% (p = 0.02) and 17% (p = 0.007), respectively (TG versus CG; p < 0.05). This was accompanied by elevated rectus femoris EMG (from 21% to 48%, p < 0.047). At AFV, TG increased GRF first peak force 4% (p = 0.047), and CG increased second peak force 5% (p = 0.036). Muscle coactivation remained unaltered in both groups. Explosive-type strength training led to enhanced stair-climbing performance at maximal and self-chosen speed, reflecting an improved functional ability.

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